Mstich/Stich from Zahrobi (parish Belcice)

Mstich/Stich from Zahrobi (parish Belcice)

Hi, I'm researching in the online parish records of Belcice and have hit on a new family name. I've seen it in many handwriting styles, in index lists (under M), and of course in the records themselves. It looks like Mstich. Is that even possible in Czech?? I find the family spread across the villages of Zahrobi and Leleticz. When I go back to the earliest church book, I find no Mstich family in Zahrobi. But there are numerous people by the name of Stich. Zahrobi is tiny; I can only assume they are the same family. But has anyone else seen this kind of name change? I'm good with spelling variations, but this one just seems like a jump.